| In order to obtain scientific and reasonable index weight and get ideal result of comprehensive evaluation in irrigation districts' water saving and improvement, the principle of comprehensive weight combination methods is described on the basis of the sum of squares of deviations and the game theory, and two kinds of comprehensive weight combination methods are applied to comprehensive evaluation of Luohuiqu and other three irrigation districts' water saving and improvement in Guanzhong area.The results show that two kinds of weight's vector have different size order, but the order of evaluation value of four irrigation districts calculated by using two kinds of weight are same.The results of further analysis show that the guiding ideology of comprehensive weight combination methods based on the sum of squares of deviations and the game theory is different, but both of their principles are scientific.In determining the index weights of an irrigation district's evaluation, if one wants to make irrigation districts' evaluation results have fully scatter degree, he should select the comprehensive weight combination method based on the sum of squares of deviations;If he wants to preserve information of all objective and subjective indexs' weights as possible, he should select the comprehensive weight combination method based on the game theory. |